XR16L580 Datasheet, PDF (37/47 Pages) Exar Corporation – SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE

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REV. 1.2.0
XR16L580
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
AC ELECTRICAL CHARACTERISTICS
UNLESS OTHERWISE NOTED: TA=0^O TO 70^OC (-40^O TO +85^OC FOR INDUSTRIAL GRADE PACKAGE), VCC=2.25 - 5.5V,
50 PF LOAD WHERE APPLICABLE
SYMBOL
PARAMETER
LIMITS
2.5
MIN
MAX
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
T_RRI Delay From IOR# To Reset Interrupt
150
75
50 ns
T_SI Delay From Stop To Interrupt
150
75
50 ns
T_INT Delay From Initial INT Reset To Transmit Start
8
24
8
24
8
24 Bclk
T_WRI Delay From IOW# To Reset Interrupt
150
75
50 ns
T_RST Reset Pulse Width
40
40
40
ns
N Baud Rate Divisor
1
2¹⁶-1
1
2¹⁶-1
1
2¹⁶-1 ^-
Bclk Baud Clock
16X of data rate
Hz
FIGURE 14. CLOCK TIMING
EXTERNAL
CLOCK
CLK
CLK
OSC
37